Operating System (OS)
Which of the following operating system reads and reacts in actual time?

Time Sharing System
Batch Processing System
Quick Response System
Real Time System

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Operating System (OS)
Swapping

allows each program in turn to use the memory
None of these
allows many programs to use memory simultaneously
works best with many small partitions
does not work with overlaying

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Operating System (OS)
A critical region is

a program segment that has not been proved bug-free
a program segment that often causes unexpected system crashes
none is the above
one which is enclosed by a pair of P and V operations on semaphores
a program segment where shared resources are accessed

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